A Modified Method of Electronystagmography for Recording Eye Movement during the Galvanic Vestibular Test
作者:
Rainer Hans Straub,
Uwe Thoden,
期刊:
ORL
(Karger Available online 1992)
卷期:
Volume 54,
issue 1
页码: 21-24
ISSN:0301-1569
年代: 1992
DOI:10.1159/000276253
出版商: S. Karger AG
关键词: Electronystagmography;Galvanic pseudonystagmus;Galvanic vestibular test
数据来源: Karger
摘要:
This study demonstrates a new technique for recording galvanic nystagmus using conventional electrooculography: a first pair of electrodes is placed at the nasal and lateral orbital margin of the left eye. An additional pair of electrodes is placed near the left angle of the mouth. This latter pair of electrodes picks up voltage variations induced by heart beat but only a minimal part of voltage variations caused by eye movements during bipolar, binaural electric stimulation. Electronic subtraction of the voltage variations near the angle of the mouth from the voltage variations at the equilateral eye cancels the cardiac interference and allows a pure recording of horizontal eye movements. 35 of 40 subjects could be examined successfully.
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